Student in S Class, he is the third son of the Jinguji family, making him rivals with Masato, who is also his roommate. He is very flirtatious, and plays the saxophone. However, his character runs deeper than the superficial. In the anime, he, along with Otoya, helps defend Haruka when the officials refused to let her take the entrance exam. Ren affectionally calls Haruka, "Little Lamb."